Kubota Mini Excavator Attachments - Buyers Guide [2023] - Skid Steers Direct

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Kubota Mini Excavator Attachments - Buyers Guide

Your Kubota mini excavator can be used for more than just digging if you have the right attachment. But depending on what Kubota mini excavator you have, the size and model of attachments you need may differ. This blog will help pick the best attachments for your Kubota mini excavator.

Kubota Excavator Attachments Key Take Aways

  • Each model of Kubota excavator has two auxiliary hydraulic circuits to power hydraulic excavator attachments.
  • Most Kubota mini excavators have a "third hydraulic line" or "case drain." This is required for some hydraulic excavator attachments.
  • The weight and power of Kubota excavators make them perfect for use with additional attachments. Check our recommendations below.

Kubota excavator with a blue sky background

Models of Kubota Mini Excavators

Kubota offers several models of mini excavators, particularly the "KX" Series and the "U" series. The main difference between the two model designations is that the "U" series has zero or minimal tail swing, depending on the model.

Each model of Kubota mini excavator will have a different hydraulic flow rate and operating weight. Let's look at some common Kubota mini excavators and consider what a good fit is for many common attachments.

We will start our recommendations for augers, brush cutters, and hydraulic hammers for the common KX series of Kubota excavators.


Kubota excavator with a brush cutter

A Note About Kubota Mini Excavator Brush Cutter Recommendations

Weight is an important consideration when looking at a mini excavator brush cutter. This is because we often use the brush cutter with the arm fully extended, reaching out from the excavator. We also tend to lift the brush cutter over objects while it is fully extended. Using too heavy of a brush cutter in these circumstances could result in tipping.

When determining the maximum weight of a brush cutter for each model, I used the maximum lifting weight with the arm fully extended off the side of the mini excavator.

This is usually the most restrictive weight; therefore, if the brush cutter can be safely lifted in this dimension, it should be safe to raise in all directions.

Of course, just because you have respected the maximum weight does not mean you will not tip the mini excavator, as operator technique and terrain features come into play.

Kubota KX033 attachments

Kubota KX033-4 Mini Excavator

The Kubota KX033-4 is the next step up in Kubota mini excavators, and its additional weight and hydraulic flow require larger and more powerful attachments.

The KX033-4's operating weight is nearly 7,400 pounds in the canopy version, and the three-cylinder diesel engine produces over 24.8 horsepower.

Like the smaller models, the KX033-4 comes with two auxiliary hydraulic circuits and a case drain. The auxiliary hydraulic circuits are adjustable up to 15.8 gallons per minute.

Kubota KX033-4 Auger Drive Attachments

For the KX033-4, Blue Diamond's "EX2" Extreme Duty Series 2 Auger drive is still a great choice. The "EX2" has a 2" hex to accept most common augers, supports flow rates between 12 and 16 gallons per minute, and weighs only 120 pounds.

Best Kubota KX033 Auger Driver

EX2 Extreme Duty Auger Driver by Blue Diamond 


Kubota KX033-4 Brush Cutter Attachments

The KX033-4 has a lifting capacity of 840 pounds with the arm fully extended over the side and the load 6 feet above the ground. For this reason, we recommend Blue Diamond's 36" low flow Heavy Duty mini excavator brush cutter. This cutter weighs 550 pounds and requires 13-24 gallons per minute of flow.

The larger 42" model Heavy-duty Brush cutter is an option if you want to work a little closer to the limits of your machine. The 42" model weighs 662 pounds without the added mount.

Best Kubota KX033 Brush Cutter

36" or 42" Heavy Duty Brush Cutter by Blue Diamond 


Kubota KX033-4 Hydraulic Hammer Attachments

You can consider moving up to the HB210 hydraulic hammer with the KX033-4 due to the mini excavators' higher weight. The HB210 is designed for mini excavators weighing 6,100 and 9,900 pounds and weighing about 460 pounds.

Best Kubota KX033 Hydraulic Breaker

HB210 Hydraulic Concrete Breaker by Blue Diamond 


Kubota KX040-4 Mini Excavator

The KX040-4 is where we see our first big increase in engine horsepower, increasing to 40.4HP. The version with a cab has an operating weight of nearly 9,500 pounds.

Like the smaller models of Kubota mini excavators, the KX040-4 has two auxiliary hydraulic circuits and a case drain line. However, an additional feature in the KX040-4 is that the operator can program up to five predetermined auxiliary oil flows in the computer's memory for use with specific attachments. The maximum hydraulic flow rate is 17 gallons per minute. 

Similar to Kubota's other models of mini excavators, the KX040-4 comes standard with a hydraulic case drain line.

Kubota KX040-4 Auger Drive Attachments

Blue Diamond's "EX3" model of Series 2 Extreme Duty auger drive system is a great fit for the KX040-2. It has a 17 to 26-gallon-per-minute auxiliary flow rate and weighs around 123 pounds.

Best Kubota KX040 Auger Driver

EX3 Extreme Duty Auger Driver by Blue Diamond 


Kubota KX040-4 Brush Cutter Attachments

The maximum lifting capacity for the KX040-4 with the arm fully extended 6 feet above the ground, over the side of the excavator, is 1,270 pounds. For this reason, we recommend Blue Diamonds 42" Heavy Duty Low Flow Brush Cutter. This model weighs 662 pounds and requires 13 to 24 gallons per minute.

If you are looking for an open-front brush cutter for more aggressive cutting, Blue Diamond's Severe Duty brush cutter is a good fit for the Kubota KX040-4.

Best Kubota KX040 Brush Cutter

42" Heavy Duty Brush Cutter by Blue Diamond 

Kubota KX040-4 Hydraulic Hammer Attachments

Blue Diamond's HB210 hydraulic breaker is a good fit for the KX040-4 mini excavator. The HB210 is designed for mini excavators weighing 6,100 and 9,900 pounds, and the hammer weighs about 463 pounds.

Best Kubota KX040 Hydraulic Breaker

HB210 Hydraulic Concrete Breaker by Blue Diamond 

Kubota KX057-5 Mini Excavator

The KX057-5 has a power increase above the smaller versions and is rated at 47.6 horsepower with its four-cylinder diesel engine. The operating weight is approximately 12,500 pounds.

Much like the hydraulic systems of the smaller Kubota mini excavators, the KX057-5 has two auxiliary hydraulic systems, with the maximum flow rate being 19.8 Gallons per minute. The flow rate of both systems can be adjusted in the cab and set in the excavator's memory for use with specific attachments. Additionally, the case drain line is electrically operated and can be selected with a switch in the cab.

Kubota KX057-5 Auger Drive Attachments

Blue Diamond's "EX4" Extreme Duty Series 2 auger drive is a perfect fit for the Kubota KX057-5. The EX4 requires 19 to 23 gallons per minute of hydraulic flow and weighs around 120 pounds.

Best Kubota KX057 Auger Driver

EX4 Extreme Duty Auger Driver by Blue Diamond 


Kubota KX057-5 Brush Cutter Attachments

The KX057-5 maximum lifting weight with the arm fully extended over the side is 1350 pounds. For this reason, Blue Diamond's 50" Heavy Duty Low Flow brush cutter is a nice fit. The 50" brush cutter weighs 914 pounds and requires 13 to 22 gallons per minute.

Additionally, because of the size and weight of the KX057-5, we suggest considering Blue Diamond's Severe Duty model of mini excavator brush cutter. This model will provide more aggressive cutting, and the thicker deck will help prevent damage.

Best Kubota KX057 Brush Cutter

50" Heavy Duty Brush Cutter by Blue Diamond 

Kubota KX057-5 Hydraulic Breaker Attachments

Blue Diamond's HB300 is the appropriate hydraulic breaker for the KX057-5. The HB300 is designed for carrier weights between 8,800 and 15,500 pounds and weighs about 660 pounds.

Best Kubota KX057 Hydraulic Breaker

HB300 Hydraulic Concrete Breaker by Blue Diamond 


Kubota KX080-4 Mini Excavator

The operating weight of the KX080-4 jumps up significantly to approximately 18,600 pounds. A 63-horsepower four-cylinder diesel engine powers it.

The Kubota KX080-4 has two auxiliary hydraulic circuits with a maximum flow rate of 26.4 gallons per minute. Like the other models, the flow rates are adjustable and can be saved in the excavator's memory. The KX080-4 comes with nine predetermined attachment icons for easy hydraulic flow selection.

KX080-4 Auger Drive Attachments

Because of the higher flow capability, the KX080-4 can be used with Blue Diamond's "EX4-HF" model of Extreme Duty Series 2 auger system. The "HF" stands for high flow, and the auger drive should be used in a flow range between 21 and 26 gallons per minute.

Best Kubota KX080 Auger Driver

EX4-HF Extreme Duty Auger Driver by Blue Diamond 


KX080-4 Brush Cutter Attachments

Blue Diamond's Severe Duty mini excavator is best used with the KX080-4. The thicker deck is designed for larger mini excavators and is more likely to handle the abuse of a heavy KX080-4.

The maximum lifting weight over the side of the KX080-4 is around 1600 pounds, so if you are going with a Heavy Duty model, we suggest the 50" model with a 100cc hydraulic motor. This brush cutter weighs 1150 pounds and uses 23 to 28 gallons per minute of hydraulic flow.

Best Kubota KX080 Brush Cutter

42" Severe Duty Brush Cutter by Blue Diamond 

KX080-4 Hydraulic Breaker Attachments

Blue Diamond's HB400 is an excellent fit hydraulic breaker for the KX080-4. This model is designed for mini excavators between 13,500 and 20,900 pounds and weighs 900 pounds.

Best Kubota KX080 Hydraulic Breaker

HB400 Hydraulic Concrete Breaker by Blue Diamond 


Finance Your Kubota Excavator Attachments

Let us help you with your excavator attachment needs with our financing program. Through our partner bank, we offer flexible financing with unbeatable terms and rates. Find out more here.

Written by Cohen Meyer
Cohen Meyer is a product researcher and content contributor for Skid Steers Direct. Cohen has spent over 12,000 hours operating skid steers, telehandlers, excavators and tractors. He is a former business owner, certified welder and a self proclaimed tech geek.

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